Description from Flora of China
Annuals or perennials, 14-50 cm tall, black when dry, hairy, glabrescent. Stems 1, quadrangular to narrowly 4-winged, unbranched or with 1 or 2 branches, apically glandular pubescent. Leaves subsessile; lower leaves orbicular-ovate, smaller than upper leaves, margin subentire to serrulate; upper leaves broadly ovate to rhomboid-ovate, 1-2.5 X 0.7-1.2 cm, margin excluding basal portion serrate; veins 5-7, palmate. Racemes to 12 cm. Pedicel ca. 3 mm, densely glandular hairy. Calyx 0.8-1.4 cm, densely glandular hairy; lobes subtriangular. Corolla dark brown, 1.6-1.8 cm, exserted from calyx, outside densely glandular hairy; lower lip 2-3 mm, lobes oblong and equal; upper lip emarginate. Capsule ovoid, ca. 1 cm. Seeds black-brown, oblong-ovoid, 1-1.2 mm, enclosed in a large, bladdery, loose, hyaline reticulate appendage ca. 2.2 X 1 mm, base with a narrow caruncle ca. 0.3 mm, apex beaked. Fl. Aug-Sep, fr. Sep-Oct.
* Thickets, grassy fields; 2700-3400 m. NW Yunnan.